The first thing to consider is whether the stomach has a cold that causes gastrointestinal dysfunction, causing gastrointestinal spasm and pain, which is not accompanied by vomiting, diarrhea and other gastrointestinal symptoms, and the pain is usually paroxysmal. Secondly, if you are hungry in the morning, there is no hunger pain, which is common in clinical cases of gastric and duodenal ulcers, and the pain will be periodic, recurrent and regular. Of course, it is not excluded whether there is acute gastrointestinal infection caused by eating unclean food, and the onset of morning sickness will be accompanied by nausea, vomiting, diarrhea and other symptoms. Finally, we cannot rule out the possibility of liver and gallbladder diseases, such as gallbladder stones, pancreatitis and appendicitis, which may cause pain. Women should also rule out gynecological diseases such as rupture of the corpus luteum and torsion of ovarian cysts. In conclusion, there are many clinical causes of stomach pain, and it is advisable to seek medical advice to confirm the diagnosis through examination.